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Ressources on diving into Diffusion Materials


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#1 Daniel Meier

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Posted 20 December 2017 - 09:33 AM

You guys know any good websites where I can learn about diffusion materials and their distinguish looks and effects?

After all I want to be able to distinguish between Frost, White Diffusion, Grid Cloth, Tough Spun and the like.

 

Some best practices or examples of usage on real lighting setups would also be warmly welcomed.

 

Or maybe even you guys can talk about your own experiences.

 

Cheers,

Daniel


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#2 Macks Fiiod

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Posted 20 December 2017 - 11:04 AM

Try this site out

http://us.rosco.com/en/mycolor


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#3 David Mullen ASC

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Posted 20 December 2017 - 11:25 AM

Just lit yourself to three strengths for starters and you'll learn -- mainly you'll learn that you can live with three strengths.  The subtleties between some of them are pretty hard to describe, meaning that they are often interchangeable, plus in the real world, you have variations in distance between the lamp and the diffusion and the subject, and variations in the lamp itself, that modify the effect also.  And you can always add an intermediate frame of diffusion to further soften a light.

 

My main point is to not worry so much about this, you'll play with different diffusions over the years and start to settle on certain preferences.

 

You can look at Stephen Murphy's tests here:


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#4 Stuart Brereton

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Posted 20 December 2017 - 11:44 AM

There's always a variety of diffusion materials on the grip truck, but honestly, I always use the same few types. LEE 250, 251 & Opal for just about everything 4x4 and smaller. Light Grid and Half Soft Frost for 6x6 and bigger. There's a fair amount of redundancy between all the different types. As David suggests, you should pick a few and work with them until you figure out what you need and don't need.


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#5 David Mullen ASC

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Posted 20 December 2017 - 11:56 AM

Mostly I use Opal, 250, and 216 on 4'x4' frames and smaller, and Half Soft Frost and Light Grid Cloth on larger frames.  Sometimes I use Muslin, but more for bounces, and sometimes a Silk on larger overheads frames outdoors, though rarely.  Occasionally Full Grid Cloth on large frames but I'm more likely to just double-diffuse, like use a large frame of Light Grid Cloth in front and a 216 or 250 intermediate if I need to spread the light a little more to fill the large frame.


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#6 Miguel Angel

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Posted 20 December 2017 - 05:29 PM

I use the ones that Stuart and David talked about plus Depron (very useful for Kinoflos / Divas / Selects / etc), in fact, 99% of the times I use a Kinoflo / Select / etc it has depron on it.

 

I also carry Leelux / Rolux, just in case I have to fill a small to medium size window completely with light and I only have a small light or a kinoflo.

 

Have a lovely day.


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#7 Stuart Brereton

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Posted 20 December 2017 - 06:23 PM

I use the ones that Stuart and David talked about plus Depron (very useful for Kinoflos / Divas / Selects / etc), in fact, 99% of the times I use a Kinoflo / Select / etc it has depron on it.

I love the quality of light from Depron. It's just difficult and expensive to source here.


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#8 Daniel Meier

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Posted 21 December 2017 - 07:23 AM

Thanks to all of you. That already helped alot.


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#9 Stefano Stroppa

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Posted 21 December 2017 - 12:12 PM

Thanks to all of you. That already helped alot.

 

I did a similiar research a few months back, and found Lee filters website extremely helpful if you want to go tech. 

You might find this interesting for you as well: http://www.leefilter...usion-list.html


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#10 Miguel Angel

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Posted 21 December 2017 - 05:21 PM

I love the quality of light from Depron. It's just difficult and expensive to source here.

 

Is it?? 

 

http://www.rcfoam.co...ron-foam-sheet/

 

There you go!! :) 

 

I think that it is the same price as in Ireland. 

A bit cheaper in Spain. 

 

In Ireland lighting rental houses don't stock it, in Spain they do and they bill it as a consumable (does that word make sense?) as an expense anyways! same as diffusion rolls and etc.

 

Have a lovely day!


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#11 Stuart Brereton

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Posted 21 December 2017 - 08:33 PM

 

Is it?? 

 

http://www.rcfoam.co...ron-foam-sheet/

 

There you go!! :)

 

I think that it is the same price as in Ireland. 

 

Thanks Miguel, but you'll notice that all the thinner sheets are out of stock, and have been for months. I've heard that Depron no longer supply foam for hobbyists, but that could just be a rumor.


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#12 Vladimir Cazacu

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Posted 22 December 2017 - 07:18 AM

Miguel, if you don't mind me asking: how much light loss is there from this 3mm Depron material?


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#13 Stuart Brereton

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Posted 22 December 2017 - 07:14 PM

Miguel, if you don't mind me asking: how much light loss is there from this 3mm Depron material?

According to my meter, it's 1.5 stops, but it will vary according to lamp placement.


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#14 Vladimir Cazacu

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Posted 22 December 2017 - 07:19 PM

Thanks. How are you finding the Depron so far? I've somehow never heard about it until now.


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#15 Stuart Brereton

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Posted 22 December 2017 - 07:39 PM

Thanks. How are you finding the Depron so far? I've somehow never heard about it until now.

It's not that widely used in film. It's actually a building insulation material, which is also used by RC aircraft modelers. That may be why you've never heard of it.

 

It's basically a styrofoam type material, available in a variety of thicknesses. The expanded cell structure of it seems to work very well for diffusing light when you're using 2 or 3mm thick sheets. It is quite brittle, and easy to damage, but the quality of soft light from it is very nice.


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#16 Miguel Angel

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Posted 24 December 2017 - 06:54 AM

Thanks Miguel, but you'll notice that all the thinner sheets are out of stock, and have been for months. I've heard that Depron no longer supply foam for hobbyists, but that could just be a rumor.


I never checked that! My apologies!

You need to come back to Europe, we have all the Depron you might want over here

Vladimir, the 3mm Depron is the one I use, usually curved when on the lamp or on a 1 meter x 1 meter diffusion frame.

Have a lovely day!
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#17 Ivon Visalli

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Posted 03 January 2018 - 05:38 PM

I also like depron and use it in front of some open face Lowel's (you have to keep it from getting too close to hot lamps as it will melt).  It is a bit of a light hog and I see at least a stop of light loss when using it, but it has a very nice diffused quality that I like.  I had never seen it used or heard of it until last year.  Fortunately I was able to get a few sheets of the 3 mm.  I didn't realize they had discontinued selling it.  Does anyone know of any other source or if RC will bring it back eventually?


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#18 Jordan Post

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Posted 05 February 2018 - 05:04 PM

I second the leefilters site. Shane Hurlbut also has done some videos on his inner circle.
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#19 Christoph Helms

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Posted 13 February 2018 - 04:39 PM

Yes, as Stefano mentioned, check out http://www.leefilter...usion-list.html for starters!

 

The most common Diffusion you find is 250, 216 and 410


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